【程序源代码】python像素贪吃蛇

"""

功能：python像素贪吃蛇

作者：程序源代码

时间：2020-07-15

"""

# 导入相关模块与函数

import random

import pygame

import sys

from pygame.locals import *

# 初始化pygame

pygame.init()

# 表明四个全局变量

global Speed

global Trackingtime

global Displayobject

global WindowTypeface

Speed = 8

Trackingtime = pygame.time.Clock()  # 创建跟踪时间对象

Displayobject = pygame.display.set_mode((640, 480))  # 设置窗口高宽640*480

WindowTypeface = pygame.font.SysFont('Calibri.ttf', 25)  # 创建Typeface对象并设置字体和字号

pygame.display.set_caption('像素贪吃蛇')  # 设置窗口标题

backgroundcolor = (255, 255, 255)  # 设置窗口底色为纯白色

# 侦测键盘操作

def CheckKeyboardPress():

    if len(pygame.event.get(QUIT)) > 0:

        pygame.quit()

        sys.exit()

    keyUpEvents = pygame.event.get(KEYUP)

    if len(keyUpEvents) == 0:

        return None

    return keyUpEvents[0].key

# 游戏开始界面设计

def DesignStartScreen():

    global Speed

    titleTypeface1 = pygame.font.SysFont('Calibri.ttf', 200)

    titleTypeface2 = pygame.font.SysFont('Calibri.ttf', 60)

    titleContent1 = titleTypeface1.render('RETRO SNAKER', True, (0, 0, 0), (0, 0, 0))  # 设置主界面文字和大小

    titleContent2 = titleTypeface2.render('RETRO SNAKER', True, (255, 0, 0))

    KeyboardContent = WindowTypeface.render('Press any key to start', True, (0, 0, 0))

    Displayobject.fill(backgroundcolor)

    revolveContent1 = pygame.transform.rotate(titleContent1, 0)

    revolveRect1 = revolveContent1.get_rect()

    revolveRect1.center = (640 / 2, 480 / 2)

    Displayobject.blit(revolveContent1, revolveRect1)

    revolveContent2 = pygame.transform.rotate(titleContent2, 0)

    revolveRect2 = revolveContent2.get_rect()

    revolveRect2.center = (640 / 2, 480 / 2)

    Displayobject.blit(revolveContent2, revolveRect2)

    # 获得一个对象的rect，以便于设置其坐标位置

    KeyboardRect = KeyboardContent.get_rect()

    KeyboardRect.topleft = (640 - 200, 480 - 30)

    Displayobject.blit(KeyboardContent, KeyboardRect.topleft)

    pygame.display.update()

    Trackingtime.tick(Speed)

    while True:

        if CheckKeyboardPress():

            pygame.event.get()  # 清除事件队列

            return

# 游戏结束界面设计

def DesignGameOverScreen():

    gameOverTypeface = pygame.font.SysFont('Calibri.ttf', 100)

    gameoverContent = gameOverTypeface.render('Game Over', True, (0, 0, 0))

    KeyboardContent = WindowTypeface.render('Press any key to restart', True, (0, 0, 0))

    gameoverRect = gameoverContent.get_rect()

    gameoverRect.center = (640 / 2, 480 / 2)

    Displayobject.blit(gameoverContent, gameoverRect)

    # 获得一个对象的rect，以便于设置其坐标位置

    KeyboardRect = KeyboardContent.get_rect()

    KeyboardRect.topleft = (640 - 220, 480 - 30)

    Displayobject.blit(KeyboardContent, KeyboardRect.topleft)

    pygame.display.update()

    pygame.time.wait(600)

    while True:

        if CheckKeyboardPress():

            pygame.event.get()  # 清除事件队列

            return

# 贪吃蛇蛇身设计

def DesignRetroSnaker(RetroSnakerCoords):

    for coord in RetroSnakerCoords:

        x = coord['x'] * 20  # 规定每行单元格的大小为20

        y = coord['y'] * 20

        RetroSnakerSegmentRect = pygame.Rect(x, y, 20, 20)

        pygame.draw.rect(Displayobject, (0, 0, 255), RetroSnakerSegmentRect)

        RetroSnakerInnerSegmentRect = pygame.Rect(x + 4, y + 4, 20 - 8, 20 - 8)

        pygame.draw.rect(Displayobject, (173, 216, 230), RetroSnakerInnerSegmentRect)

# 苹果设计

def DesignApple(coord):

    x = coord['x'] * 20  # 规定单元格的大小为20

    y = coord['y'] * 20

    appleRect = pygame.Rect(x, y, 20, 20)

    pygame.draw.rect(Displayobject, (255, 0, 0), appleRect)

# 得分分数设计

def DesignScore(score):

    scoreContent = WindowTypeface.render('Score: %s' % (score), True, (0, 0, 0))

    scoreRect = scoreContent.get_rect()

    scoreRect.topleft = (640 - 100, 10)

    Displayobject.blit(scoreContent, scoreRect)

# 边框线设计

def DesignBorderline():

    for x in range(0, 640, 640 - 1):  # 绘制垂直线

        pygame.draw.line(Displayobject, (0, 0, 0), (x, 0), (x, 480), 5)

    for y in range(0, 480, 480 - 1):  # 绘制平行线

        pygame.draw.line(Displayobject, (0, 0, 0), (0, y), (640, y), 5)

# 设置游戏主要运行机制

def GameRunning():

    global Speed

    # 设置随机起点

    startx = random.randint(5, 26)  # 初始单元格位置横向在(5, 26)范围中选一个随机数

    starty = random.randint(5, 18)  # 初始单元格位置纵向在(5, 18)范围中选一个随机数

    RetroSnakerCoords = [{'x': startx, 'y': starty},

                         {'x': startx - 1, 'y': starty},

                         {'x': startx - 2, 'y': starty}]  # RetroSnakerCoords：列表，贪吃蛇坐标位置

    direction = 'right'  # 初始方向朝右

    # 设置苹果在一个随机位置

    apple = {'x': random.randint(0, 31), 'y': random.randint(0, 23)}

    while True:  # 游戏主循环

        # 判断键盘事件

        for event in pygame.event.get():  # 事件处理循环

            if event.type == KEYDOWN:

                if event.key == K_LEFT and direction != 'right':

                    direction = 'left'

                elif event.key == K_RIGHT and direction != 'left':

                    direction = 'right'

                elif event.key == K_UP and direction != 'down':

                    direction = 'up'

                elif event.key == K_DOWN and direction != 'up':

                    direction = 'down'

        # 根据方向改变蛇头的坐标

        if direction == 'up':

            m = {'x': RetroSnakerCoords[0]['x'], 'y': RetroSnakerCoords[0]['y'] - 1}

        elif direction == 'down':

            m = {'x': RetroSnakerCoords[0]['x'], 'y': RetroSnakerCoords[0]['y'] + 1}

        elif direction == 'left':

            m = {'x': RetroSnakerCoords[0]['x'] - 1, 'y': RetroSnakerCoords[0]['y']}

        elif direction == 'right':

            m = {'x': RetroSnakerCoords[0]['x'] + 1, 'y': RetroSnakerCoords[0]['y']}

        # 通过向贪吃蛇移动的方向添加一个单元格来加长贪吃蛇

        RetroSnakerCoords.insert(0, m)

        # 侦测贪吃蛇是否吃到苹果

        if RetroSnakerCoords[0]['x'] == apple['x'] and RetroSnakerCoords[0]['y'] == apple['y']:

            apple = {'x': random.randint(0, 31), 'y': random.randint(0, 23)}  # 在随机位置放置一个苹果

            Speed = Speed + 0.2

        else:

            del RetroSnakerCoords[-1]  # 去除贪吃蛇的尾段

        # 侦测贪吃蛇是否触碰到窗口边缘或自身

        if RetroSnakerCoords[0]['x'] == -1 or RetroSnakerCoords[0]['x'] == 32 or RetroSnakerCoords[0]['y'] == -1 or \

                RetroSnakerCoords[0]['y'] == 24:

            return  # 游戏结束

        for RetroSnakerBody in RetroSnakerCoords[1:]:

            if RetroSnakerCoords[0]['x'] == RetroSnakerBody['x'] and RetroSnakerCoords[0]['y'] == RetroSnakerBody['y']:

                return  # 游戏结束

        # 绘制相关角色在窗口中

        Displayobject.fill(backgroundcolor)

        DesignRetroSnaker(RetroSnakerCoords)

        DesignApple(apple)

        DesignScore(len(RetroSnakerCoords) - 3)

        DesignBorderline()

        pygame.display.update()  # 让绘制的东西显示在屏幕上

        Trackingtime.tick(Speed)

# 主函数

if __name__ == '__main__':

    DesignStartScreen()  # 初始化游戏开始界面

    while True:

        GameRunning()  # 游戏开始

        DesignGameOverScreen()  # 游戏结束